Martinelli has been a key player for Arteta during his time as Arsenal manager but the winger’s drop in form meant he had become the topic of fan debate about his place in the team.
The Brazil international was aware of that talk and his confidence suffered.
He scored 10 goals in all competitions last season, with a memorable strike coming in their quarter-final second-leg win at Real Madrid in the Champions League.
Arteta has always trusted Martinelli in big games and the manager was delighted for the 24-year-old to play such a big part in this Arsenal win.
“He fully deserves it,” said Arteta. “I adore Gabi. His attitude, his commitment, his positivity, what he is willing to do for the team.
“We certainly value all of the quality he has and brings to the team – I am so happy he has decided the game for us in the two actions.”
The Arsenal players ran to celebrate with Martinelli after his goal, with Riccardo Calafiori pointing at the player’s name on the back of his shirt in front of the supporters.
“That’s the spirit,” added Arteta. “That’s why I really enjoy every single day working with them and being part of this team.
“The way they look after each other is genuine. They really want the best for each other and they recognise someone that works every single day in the manner that Gabi does. You can go through struggles or through moments, and recognising that and having that capacity to connect with him, I think it will mean a lot to him.”
“I was sure that Gabi was going to react like that. You raise the level to Gabi and he was going to do that.
“They are the moments that hopefully are going to give him the confidence again to go, as he is an outstanding player.”